A household hints column in a 1917 issue of Good Housekeeping invited readers to send in their tips for possible publication Readers whose submissions were published received $1 from the magazine. One hint was to keep coffee warm in a thermos bottle when entertaining.
Let the Thermos Help Out
I find my thermos bottle comes in handy when I wish to serve coffee to more people than my percolator will accommodate. My percolator will hold six cups. This I make in the regular way an hour or so before I wish to serve it. Pour it into the thermos bottle, which of course, would keep it hot for hours, and then proceed to make another potful to be ready just in time to serve. The coffee in the thermos bottle I hold in reserve for the second helping. — Mrs. M.E., Minn.
Good Housekeeping (October, 1917)